Which group of fishes includes a lineage that migrated out of fresh water and adapted to life on land?
A) ray-finned fishes
B) jawless fishes
C) lobe-finned fishes
D) cartilaginous fishes
C
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The possession of two pairs of antennae is a characteristic of _____
A) spiders B) insects C) centipedes D) millipedes E) crustaceans
The antibiotic tetracycline binds to the 30S subunit of the ribosome as shown in Figure 20.1. The effect is to
a. Prevent attachment of tRNA. b. Prevent peptide bond formation. c. Prevent transcription. d. Stop the ribosome from moving along the mRNA. e. Prevent attachment of tRNA and mRNA.
The differences produced between breeds produced by artificial selection are more distinctive than differences between wild species.
Answer the following statement true (T) or false (F)
Which group has high resistance to HIV, because it helped them combat smallpox and the plague?
A. europeans B. caucasians C. asians D. africans